Burner for solid fuel



MayZZ, 1923. 1,456,475

c. TOMMASI ET AL BURNER FOR SOLID FUEL Filed Feb. 20, 1922 c.72mmaa'i 1.5a my/a/m, INVENTORS By Wnee/ If /1 3,

Fatented may 22, 19225;.

UNHTE TABS 1.;

trait CARLO TOMMASI, JOHN SANDHOLM, HEINRICH. DANNEEL, AND AUGUSTO BUSCH, OF BASEL, SWITZERLAND, ASSIGNORS TO ELEKTRIZITATSWERK LONZA, O1? BASEL SWITZERLAND.

BURNER FOE SOLID FUEL.

Application filed February 20, 1922. Serial No. 538,041.

To all whom it may concern:

Be it known that we, CARLo TOMMASI, a subject of the King of Italy, JOHN SAND- HOLM, a citizen of the Republic of Finland,

#3 HEINRICH DANNEEL, a citizen of the German Republic, and AUoUs'ro BUsoH, a subject of the King of Italy, all four residents of Basel, Switerland, have invented a new and useful Burner for Solid Fuel, of which the following is a full, clear, and exact specification.

This invention relates to all means for burning a solid fuel, such as the metaldehyde fuelv described in our application filed March 22, 1920, Serial No. 367,701, Patent #1,407,l01 in such manner that the lowering of the surface where combustion takes place by gradual consumption of the fuel is automatically compensated for. Heretofore, in the use of solid fuels, such as solid alcohol, as the burning proceeds the source of propagation of the flame becomes further and further removed from the object to be heated. The burner of the present invention, is more particularly adapted for utilizing blocks or tablets of solid fuel in such manner that the block is progressively advanced as the heating continues and the surface of the block is burned off. Therefore, the distance of the burning surface from the object to be heated will always be the same no matter how much of the block may have been consumed. It thus becomes possible to utilize every particle of the block without waste, and to heat just as efficiently when the block has largely been consumed as when a new block is in place in the apparatus. Means are also provided for regulating the area of the combustion surface of the fuel block, so that the volume of the flame may be increased or decreased at will. Further objects of the invention will hereinafter apear.

p The invention will be understood by reference to the accompanying drawing in. which,

Fig. 1 is a perspective view, partly in section, of a burner which is designed to hold an object in position to receive the flame.

Fig. 2 is a cross section in line 2-2, Fig. 1.

Fig. 3 is a sectional elevation of a burner adapted for use as a pocket light, or for heating small objects, and

Fig. 4: is a cross section on line 44, Fig. 3.

By reference to Figures 1 and 2, it will be seen that the embodiment of the invention therein shown comprises a base member 1, preferably of metal, which is formed with a centrally disposed rectangular chamber 2, and a surrounding closed chamber 3, which may be employed for the reception of a cooling fluid. Fitted within rectangular chamber 2, for vertical movement therein, is a table 4, and disposed beneath the same is a spring 5 which tends to move the table upwardly. By the action of the said spring a fuel block 5 supported by the table is constantly maintained in such position that IiJts upper surface is engaged by a stop mem- Stop member 6 is adjustable so as to cooperate with the table 4 and spring 5 to regulate the surface of combustion of the fuel block, and hence the volume of the flame. In this connection it will be understood that when the fuel block is moved upwardly so that its sides are exposed for a certain distance above chamber 2, the combustible surface of the block will be correspondingly augmented, because the flame will spread from the top of the block to the sides thus exposed. In the present embodiment of the invention, stop member 6 is attached to a stiff wire 7 which passes downwardly through a shallow vertical slot a formed in the wall of chamber 2 and thence through a tube t communicating with said slot and soldered about the same to provide a water tight connection. The opposite end of the tube has a similar water tight connection with a slot 6 formed in the outer wall of the burner. Exterior to this slot the wire 7 is secured to a button 8. Button 8 is movable in slot 6 so as to vary its distance from slot at, and hence it may be manipulated to adjust the position of contact member 6. This construction permits the stop member to be moved down wardly into such position that the block of fuel on table 4; may be depressed so that its upper surface will lie flush with the top of chamber 2. In such position the combustible area of the block will be limited to its exposedupper surface. When, however, button '8 is moved tothe left from its position as Fig. 1, stop member 6 will be correspondingly elevated, and, simultaneously, table 4} and the fuel block will be moved'upwardly-by the spring. This con struction, in addition to providing means for increasing or decreasing the volume of flame, permits the stopmember to be moved cover is .designed to support a curlingiron.

or'the like, indicated in, dotted lines, and for this purpose the cover is formed with a flange 8 which is cut away at; 10 to form a semi-circular seat to receive the handle of the curling iron, andtoact in conjunction withthe opposite raised wall 11 to support the curling iron at two points. The base of the cover, in its open position, is adapted to hold an asbestos sheet 12, which will come into contact with the. burning surface of the block when the cover is moved to closed position, thus extinguishing the flame.

As hereinbefore stated, chamber 3 may be employed for the reception ofcoolingfluid, In practice this cooling fluid may be water, inasmuch as the heat to which the burner is subjected is insufiicient to raise the water to the steaming point. Forthis reason the water may be permanently sealed within the chamber if desired. In the construction of the burner, the base plate 39 may be soldered or welded to the side walls of theburner after the water is placed in the chamber, or the chamber may be provided with a suitable valve through which the cooling liquid may be admitted at any time.

In the form of the invention illustrated in Figures 3. andt, the. burner is adapted as a pocket light, or for heating small objects, such as surgical or dental instruments. To. this end the height of the burner is substantially greaterthan its width, and it is formed with a central fuel chamber- 13 which is, adaptedfto contain a relatively long and narrow block of fuel 14. Disposed on. opposite sides of fuel chamber 13 are enclosed chambers 15, which may serve for the reception of acooling, fluid, and these chambers may entirely surround the fuel chamber 13, desired, the cooling fluid being working in a plate 20 and in register witha depression 2O formed in. the outer. wallyof' the burner. A vertical slot .isformed in'.de;-.

pressionz20, forthe passage of. thestem ofl the button.21 which is thereby secure'dto plate 20. By moving the button. vertically stop member 19 may be adjustedso as-tov regulate. the combustion area of. the fuel.:. block, and the volume of the flame, as den.

scribed with respect, to the. construction shown in. the preceding figures;

It will be understood that in'either em bodiment the supporting, table; for. the fuel"v block maybe manually elevated by. any suite;- able means,v the spring .being'dispensed with.;. For example, as shown in Fig.4, the table. may be connected to the stem-. 22 of a'ibutton. 22 disposed exterior to a .vertical slot, .23 formed in the outer wall-of.- theburnerso... that the table may, beperiodically elevated-c by means ofthe button as the .burni-n of the;

fuel block progresses. In said case, t e1 fric- H tion between the table andzthe'walls zofthe:

fuel chamber will serve to .holdethe tablewin.

tllGuPOSllZlOIl to which it is moved, ior.rthe:but+ ton may be threadedzonstem- 22, .so. that it.

may be turned. to clamp thetablein. itsaade justed position, as shownyin Fig. 4. J

Having described; my. invention, .what I claim and desire --.tov secure byr'Letters- Bata ent is:

1. A burner comprising meansuforzsupeporting avblock of fuel; a.stop.;. meansgforrv urging the fuel block towards the-stop; and; means forvarying the :position of thGlStOPJ...

2'. A burner provided with meansforssupe.

porting a block of fuel; means. providing. a: recess having walls adapted'to contain said] block'of fuel a stop means for urging a block of fuel towards the stop; .and means for elee a said fuel inproportion; as it -is vconsumedgs:

.vating or depressing the stop wherebyto dee and means for regulating: the. rate. of icon sumption: of said :fuel:

4. A burner comprising means formingga chamber for a bodyrof fuel,- asupport forxthe some fuel; means for elevating said support; a signed our names this lth day of January, stop carried by the burner and adapted to 1922, in the presence of two subscribing witengage the body of fuel; and means for adnesses.

justing the position of the stop. X 5 5. A burner comprising in combinatio means for supporting a block of fuel ex- HEINRICH D ANNEEL posing a portion thereof to the atmosphere for combustion along the exposed portion; AUGUSTO BUSCH' and means carried by the burner for varying Witnesses: 10 the extent of exposure of said block. FUSHE KURz,

In Witness whereof we have hereunto AMAND BITTER. 

